Put the functionality for printing a value to a raw_ostream as an

operand into the Value interface just like the core print method is.
That gives a more conistent organization to the IR printing interfaces
-- they are all attached to the IR objects themselves. Also, update all
the users.

This removes the 'Writer.h' header which contained only a single function
declaration.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198836 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/CFGPrinter.h

@@ -18,7 +18,6 @@
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/Instructions.h"
-#include "llvm/IR/Writer.h"
 #include "llvm/Support/CFG.h"
 #include "llvm/Support/GraphWriter.h"
 
@@ -40,7 +39,7 @@ struct DOTGraphTraits<const Function*> : public DefaultDOTGraphTraits {
     std::string Str;
     raw_string_ostream OS(Str);
 
-    WriteAsOperand(OS, Node, false);
+    Node->printAsOperand(OS, false);
     return OS.str();
   }
 
@@ -51,7 +50,7 @@ struct DOTGraphTraits<const Function*> : public DefaultDOTGraphTraits {
     raw_string_ostream OS(Str);
 
     if (Node->getName().empty()) {
-      WriteAsOperand(OS, Node, false);
+      Node->printAsOperand(OS, false);
       OS << ":";
     }